JPH01237045A - Method for casting lost foam pattern - Google Patents
Method for casting lost foam patternInfo
- Publication number
- JPH01237045A JPH01237045A JP6382588A JP6382588A JPH01237045A JP H01237045 A JPH01237045 A JP H01237045A JP 6382588 A JP6382588 A JP 6382588A JP 6382588 A JP6382588 A JP 6382588A JP H01237045 A JPH01237045 A JP H01237045A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- pattern
- sand
- lost
- lost foam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005266 casting Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000006260 foam Substances 0.000 title abstract description 28
- 239000004576 sand Substances 0.000 claims abstract description 50
- 239000003110 molding sand Substances 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 7
- 238000010114 lost-foam casting Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 9
- 238000010115 full-mold casting Methods 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract 2
- 239000004793 Polystyrene Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000005187 foaming Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229920002223 polystyrene Polymers 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 8
- 230000035699 permeability Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920006327 polystyrene foam Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、ポリスチレン発泡体等で目的とする鋳物形状
に成形したロストフオーム(消失性模型)を鋳枠内の鋳
物砂に埋設した後、溶湯を注湯して上記ロストフオーム
を消失させながら鋳物を得る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention involves embedding a lost form (disappearing model) made of polystyrene foam or the like into a desired casting shape in casting sand in a casting flask. A casting is obtained by pouring molten metal to eliminate the lost foam.
いわゆるフルモールド鋳造法と呼ばれるロストフオーム
鋳造方法に関し、特に内部が湾曲した筒状ロストフオー
ムを用いた場合における鋳造方法に関する。The present invention relates to a lost form casting method called a so-called full mold casting method, and particularly to a casting method using a cylindrical lost form with a curved interior.
(従来の技術)
一般に、内部が湾曲した筒状鋳物を得る場合、鋳物砂を
筒状ロストフオームの内部(孔部)に隙間なく充填する
ことが難しく、このため、得られた筒状鋳物のロストフ
オーム孔湾曲部に相当する部分に鋳造欠陥が発生すると
いう問題があった。(Prior art) Generally, when obtaining a cylindrical casting with a curved interior, it is difficult to fill the inside (hole) of the cylindrical lost form with molding sand without any gaps. There was a problem in that casting defects occurred in the portion corresponding to the curved portion of the lost form hole.
そこで、このような鋳造欠陥対策として、例え・ば特開
昭59−39447号公報に開示されているように、筒
状ロストフオームの孔湾曲部に耐火物からなるバックア
ツプ層を予めコーティングにより形成しておくことによ
り、上記ロストフオームを鋳枠内の鋳物°砂に埋設した
際、ロストフオームの孔部に鋳物砂の充填不良が生じて
も、該ロストフオームの孔湾曲部の強度を上記バックア
ツプ層によって補強して筒状原物を鋳造欠陥なく精度良
く仕上げる方法が知られている。Therefore, as a countermeasure against such casting defects, for example, as disclosed in Japanese Patent Laid-Open No. 59-39447, a back-up layer made of a refractory material is formed in advance by coating on the curved part of the hole of the cylindrical lost form. By doing so, when the lost foam is buried in foundry sand in a casting flask, even if the hole in the lost foam is not filled with molding sand, the strength of the curved hole in the lost foam can be maintained as above. A method is known in which a cylindrical original is reinforced with an up layer and finished with high accuracy without casting defects.
(発明が解決しようとする課題)
ところが、上記の公報例による方法では、内部が湾曲し
た筒状ロストフオームを鋳枠内に入れる前に、その鋳物
砂充填不良箇所である孔湾曲部にバックアツプ層を形成
するコーティング工程を経なければならず、このため、
鋳造作業性が低下する嫌いがあった。さらに、上記コー
ティング部(バックアツプ層)が注湯時のロストフオー
ムの消失により発生するガスの通気性を疎外し、このた
め、得られた筒状鋳物のロストフオーム孔湾曲部に相当
する部分に鋳造欠陥が発生するおそれもあった。(Problem to be Solved by the Invention) However, in the method according to the above-mentioned publication example, before placing the cylindrical lost form with a curved inside into the casting flask, back-up is applied to the curved part of the hole where the molding sand filling is defective. It has to go through a coating process that forms a layer, so
This has the disadvantage of reducing casting workability. Furthermore, the above-mentioned coating part (backup layer) reduces the permeability of the gas generated by the disappearance of the lost form during pouring, and therefore, the part corresponding to the curved part of the lost form hole of the obtained cylindrical casting is There was also a risk that casting defects would occur.
本発明はかかる点に鑑みてなされたものであり、その目
的とするところは、孔部が湾曲した筒状ロストフオーム
の開口部に適切な手段を講することにより、上記ロスト
フオームを鋳枠内の鋳物砂に埋設した際、鋳物砂をロス
トフオームの孔湾曲部に隙間なく確実に充填せしめ、こ
れによりロストフオームを鋳枠内に入れる前に、その孔
湾曲部にバックアツプ層を形成するコーティング工程を
経る必要をなくして鋳造作業性の向上を図らんとするこ
とにある。さらに、上述の如くバックアツプ層を不要と
なして、注湯時における該バックアツプ層による通気性
疎外を解消せしめ、得られた筒状鋳物のロストフオーム
孔湾曲部に相当する部分への鋳造欠陥の発生を確実に防
止せんとすることにある。The present invention has been made in view of the above, and an object of the present invention is to introduce the lost foam into the casting flask by providing an appropriate means to the opening of the cylindrical lost foam having a curved hole. A coating that ensures that the foundry sand fills the curved part of the hole without any gaps when buried in foundry sand, thereby forming a back-up layer in the curved part of the hole before the lost form is placed in the casting flask. The purpose is to improve casting workability by eliminating the need for a process. Furthermore, as mentioned above, the back-up layer is not required, eliminating the problem of air permeability due to the back-up layer during pouring, and casting defects in the portion corresponding to the curved part of the lost form hole in the resulting cylindrical casting. The aim is to reliably prevent the occurrence of
(課題を解決するための手段)
上記の目的を達成するため、本発明の解決手段は、内部
が湾曲した筒状ロストフオームを鋳枠内の鋳物砂に埋設
し、その後、上記ロストフオームを溶湯により消失させ
ながら筒状鋳物を得るロストフオーム鋳造方法において
、予め上記ロストフオームの開口部に、鋳物砂をロスト
フオーム内方にのみ移動させる砂詰め治具を装管してお
く。そして、この砂詰め治具が装着されたロストフオー
ムを上記鋳枠内に入れてロストフオーム内部に鋳物砂を
上記砂詰め治具を介して充填するようにする。(Means for Solving the Problems) In order to achieve the above object, the solving means of the present invention embeds a cylindrical lost form having a curved inside in molding sand in a casting flask, and then embeds the lost form in the molten metal. In the lost form casting method, in which a cylindrical casting is obtained while the sand disappears, a sand-filling jig is installed in advance in the opening of the lost form to move the foundry sand only into the inside of the lost form. Then, the lost foam fitted with the sand filling jig is placed in the casting flask, and the inside of the lost foam is filled with molding sand via the sand filling jig.
(作用)
上記の構成により、本発明方法では、鋳枠内の鋳物砂に
埋設された筒状ロストフオームの内部には、上記鋳物砂
がロストフオーム開口部に装着された砂詰め治具を介し
て充填され、この充填された鋳物砂は上記砂詰め治具に
よってロストフオーム内方にのみ移動させられてロスト
フオーム外方への排出が阻止される。このことから、鋳
物砂がロストフオーム内部に隙間なく確実に充填され、
これにより上記ロストフオームを鋳枠内に入れる前に、
その孔湾曲部にバックアツプ層を形成するコーティング
工程を経る必要がなくされて鋳造作業性の向上が図られ
ることとなる。さらに、上述の如くバックアツプ層を形
成しなくて済むことから、注湯時における該バックアツ
プ層による通気性疎外が解消され、得られた筒状鋳物の
ロストフオーム孔湾曲部に相当する部分への鋳造欠陥の
発生が確実に防止されることとなる。(Function) With the above configuration, in the method of the present invention, the foundry sand is filled into the inside of the cylindrical lost form buried in foundry sand in the flask through the sand filling jig attached to the lost form opening. The filled molding sand is moved only to the inside of the lost foam by the sand filling jig and is prevented from being discharged to the outside of the lost foam. From this, the foundry sand is reliably filled inside the lost form without any gaps.
As a result, before putting the lost foam into the flask,
There is no need for a coating process to form a back-up layer on the curved portion of the hole, thereby improving casting workability. Furthermore, since it is not necessary to form a back-up layer as described above, the air permeability caused by the back-up layer during pouring is eliminated, and the part corresponding to the curved part of the lost form hole of the obtained cylindrical casting is The occurrence of casting defects will be reliably prevented.
(実施例)
以下、本発明の実施例に係るロストフオーム鋳造方法を
説明する。(Example) Hereinafter, a lost foam casting method according to an example of the present invention will be described.
まず、第1図(a)および第1図(b)に示す如き円板
形状の耐火物製砂詰め治具1を2つ用意する。該各砂詰
め治具1には多数のテーパ孔1a。First, two disc-shaped refractory sand filling jigs 1 as shown in FIG. 1(a) and FIG. 1(b) are prepared. Each sand filling jig 1 has a large number of tapered holes 1a.
la、・・・が厚さ方向に貫通して形成され、該各テー
バ孔1aの傾斜角度は例えば20〜30@に設定されて
いる。また、上記各テーパ孔1aの最狭孔径は、例えば
使用する鋳物砂6.6.・・・(第3図(a)〜(C)
に表われる)の粒径が35〜70メツシユである場合に
は3〜4mmに設定する等、鋳物砂6,6.・・・の粒
径に応じて適宜決定されるものである。そして、このよ
うに多数のテーパ孔la、la、・・・が形成された各
砂詰め治具1は、上記各テーパ孔1aの形状により、鋳
物砂6,6゜・・・を各テーパ孔1aの最広孔径側から
最狭孔径側へと通過させることができるが、その逆方向
へは通過させることができない、いわゆるワンウェイ機
能を有しているものである。la, . . . are formed to penetrate in the thickness direction, and the inclination angle of each tapered hole 1a is set to, for example, 20 to 30@. Further, the narrowest hole diameter of each of the tapered holes 1a is, for example, 6.6 mm of the molding sand used. ...(Figure 3 (a) to (C)
If the grain size of the foundry sand is 35 to 70 mesh, it is set to 3 to 4 mm. It is determined appropriately according to the particle size of... Each sand filling jig 1 in which a large number of tapered holes la, la, . It has a so-called one-way function in which it can pass from the widest hole diameter side to the narrowest hole diameter side of 1a, but cannot pass in the opposite direction.
次いで、第2図に示すように、ポリスチレン発泡体等で
目的とする鋳物形状(回倒では異形管としてのベント形
状を示す)に成形した。内部(孔部2a)が湾曲した筒
状ロストフオーム2の両開口部に上記両砂詰め治具1,
1を各々の各テーパ孔1a最狭孔径側を各開口部側に向
けた状態で嵌め合いにより装着する。Next, as shown in FIG. 2, polystyrene foam or the like was formed into the desired casting shape (the bent shape shows a bent shape as a deformed tube). Both sand filling jigs 1,
1 are fitted to each other with the narrowest hole diameter side of each tapered hole 1a facing toward each opening.
その後、第3図(a)に示すように、上記両砂詰め治具
1,1が装着されたロストフオーム2に対し湯口3が設
けられた湯道4を取り付けた後、該湯道4が取り付けら
れたロストフオーム2を鋳枠5内に入れ、該鋳枠5内に
鋳物砂6,6.・・・を供給しなから鋳枠5をバイブレ
ータ7によって3軸方向に所定の加振条件の下で振動さ
せ、上記ロストフオーム2を鋳物砂6,6.・・・に埋
設する。Thereafter, as shown in FIG. 3(a), the runner 4 provided with the sprue 3 is attached to the lost form 2 to which the sand filling jigs 1 and 1 are attached, and then the runner 4 is installed. The attached lost form 2 is placed in a casting flask 5, and molding sand 6, 6 . . . , the casting flask 5 is vibrated in three axial directions under predetermined vibration conditions by a vibrator 7, and the lost foam 2 is mixed with molding sand 6, 6, . Buried in...
この際、図示しないエア供給源より配管8を介して鋳枠
5内に加圧エアを供給し、鋳物砂6,6゜・・・を流動
させるようにする。At this time, pressurized air is supplied from an air supply source (not shown) into the flask 5 through the piping 8 to cause the molding sand 6, 6°, . . . to flow.
しかる後、第3図(b)および第3図(C)に示すよう
に、上記鋳枠5に対する鋳物砂6,6゜・・・の供給お
よび振動を続けた状態で鋳枠5を例えば30″の角度で
左右に2〜3回傾け、ロストフオーム孔部2aに各砂詰
め治具1を介して鋳物砂6.6.・・・を充填する。こ
の鋳物砂6,6.・・・充填に際し、−旦、ロストフオ
ーム孔部2aに充填された鋳物砂6,6.・・・は、各
砂詰め治具1のワンウェイ機能によってロストフオーム
内方にのみ移動させられ、その逆方向であるロストフオ
ーム外方への移動が阻止されることから、ロストフオー
ム空洞部2aにおける鋳物砂6.6.・・・は漸増して
減ることがなく、よってロストフオーム孔部2aが隙間
なく充填されることとなる。Thereafter, as shown in FIG. 3(b) and FIG. 3(C), the flask 5 is heated, for example, by 30° while continuing to supply molding sand 6,6°... to the flask 5 and vibrating it. Tilt left and right two or three times at an angle of 2 to 3 seconds, and fill the lost form hole 2a with the foundry sand 6, 6,... through each sand filling jig 1.The foundry sand 6, 6... During filling, the foundry sand 6, 6, etc. filled in the lost foam hole 2a is moved only inward of the lost foam by the one-way function of each sand filling jig 1, and in the opposite direction. Since a certain lost foam is prevented from moving outward, the molding sand 6, 6, etc. in the lost foam cavity 2a gradually increases and does not decrease, so that the lost foam hole 2a is filled without any gaps. The Rukoto.
その後、上記湯口3より溶湯(図示せず)を注湯する。Thereafter, molten metal (not shown) is poured from the sprue 3.
これにより上記ロストフオーム2は溶湯の有する高熱を
受けて完全に熱分解して消失せしめられ、一部すす状カ
ーボンとなるほかは炭酸ガスと水蒸気となり、鋳物砂6
,6.・・・中でロストフオーム2が占めていた空間が
そのまま筒状鋳物に入れ替わる。そして、得られた筒状
鋳物の冷却を待って鋳枠5内より取り出し、その両端開
口部を塞いでいる両砂詰め治具1.1を取り外すことで
製品としての筒状鋳物(ベント)が出来上がる。As a result, the lost foam 2 receives the high heat of the molten metal and completely thermally decomposes and disappears, and a part of it becomes soot-like carbon and becomes carbon dioxide gas and water vapor, and the foundry sand 6
,6. ...The space occupied by Lost Form 2 inside is replaced by a cylindrical casting. After the obtained cylindrical casting has cooled, it is taken out from the flask 5, and the sand filling jig 1.1 that blocks the openings at both ends is removed to form the cylindrical casting (vent) as a product. It's done.
このように、本実施例では、筒状ロストフオーム2の両
開口部に砂詰め治具1,1を装着し、この各砂詰め治具
1が装着されたロストフオーム2を鋳枠5内の鋳物砂6
,6.・・・に埋設することにより、該鋳物砂6,6.
・・・を各砂詰め治具1の多数のテーバ孔1a、la、
・・・からロストフオーム外方への排出を阻止した状態
でロストフオーム空洞部2aに充填し得る。このことか
ら、鋳物砂6゜6、・・・をロストフオーム孔部2aに
隙間なく確実に充填せしめ、これによりロストフオーム
2を鋳枠5内に入れる前に、その孔湾曲部にバックアツ
プ層を形成するコーティング工程を経る必要がなくなっ
て鋳造作業性の向上を図ることができる。As described above, in this embodiment, the sand filling jigs 1 and 1 are attached to both openings of the cylindrical lost form 2, and the lost form 2 with each of the sand filling jigs 1 attached is placed in the casting flask 5. Foundry sand 6
,6. ... by burying the foundry sand 6,6.
. . . in the numerous taber holes 1a, la, of each sand filling jig 1.
... can be filled into the lost foam cavity 2a while preventing the lost foam from being discharged to the outside. From this, the foundry sand 6°6,... is reliably filled into the lost form hole 2a without any gaps, and as a result, before the lost form 2 is put into the casting flask 5, a back-up layer is applied to the curved part of the hole. It is no longer necessary to go through a coating process to form a coating process, thereby improving casting workability.
さらに、上述の如くバックアツプ層を形成しなくて済む
ことから、注湯時における該バックアツプ層による通気
性疎外を解消して、得られた筒状鋳物のロストフオーム
孔湾曲部に相当する部分への鋳造欠陥の発生を確実に防
止することができる。Furthermore, since it is not necessary to form a back-up layer as described above, the air permeability caused by the back-up layer during pouring is eliminated, and the portion corresponding to the curved part of the lost form hole of the obtained cylindrical casting is eliminated. It is possible to reliably prevent the occurrence of casting defects.
なお、上記実施例では、筒状鋳物が異形管としてのベン
トである場合を例示したが、これに限らず、例えばエル
ボ、T型継手およびY型継手等の異形管を得る場合にも
適用可能なことは勿論である。さらには、異形管に限ら
ず、孔部2aに湾曲部を有する筒状鋳物であれば、例え
ば開口部が1つの有底筒状のものであってもよい。In addition, in the above embodiment, the case where the cylindrical casting is a vent as an irregularly shaped pipe is illustrated, but the present invention is not limited to this, and can also be applied to the case of obtaining irregularly shaped pipes such as an elbow, a T-shaped joint, a Y-shaped joint, etc. Of course. Furthermore, it is not limited to a deformed pipe, but may be a cylindrical casting having a curved part in the hole 2a, for example, a bottomed cylindrical one having one opening.
また、上記実施例では、ロストフオーム2に対する両砂
詰め治具1,1の装着要領を嵌め合いにより行ったが、
接着剤や粘着テープ等を用いることも可能なことはいう
までもない。In addition, in the above embodiment, the method for attaching both sand filling jigs 1 and 1 to the lost foam 2 was done by fitting them together.
Needless to say, it is also possible to use adhesives, adhesive tapes, etc.
(発明の効果)
以上説明したように、本発明方法によれば、内部が湾曲
した筒状ロストフオームの開口部に鋳物砂をロストフオ
ーム内方にのみ移動させる砂詰め治具を装着し、この砂
詰め治具が装着されたロストフオームを鋳枠内に入れて
ロストフオーム内部に鋳物砂を砂詰め治具を介して充填
するので、鋳物砂をロストフオーム内部に隙間なく確実
に充填し得、ロストフオームの孔湾曲部にバックアツプ
層をコーティングにより形成する手間を省略して鋳造作
業性の向上を図ることができる。さらに、上記バックア
ツプ層による通気性疎外に起因する鋳造欠陥の発生を確
実に防止することができる。(Effects of the Invention) As explained above, according to the method of the present invention, a sand filling jig is attached to the opening of the cylindrical lost form having a curved inside to move the foundry sand only inward of the lost form. The lost form with the sand filling jig attached is placed in the casting flask and the inside of the lost form is filled with molding sand via the sand filling jig, so that the foundry sand can be reliably filled inside the lost form without any gaps. Casting workability can be improved by omitting the trouble of forming a back-up layer on the curved portion of the hole of the lost form by coating. Furthermore, it is possible to reliably prevent the occurrence of casting defects due to the lack of air permeability due to the back-up layer.
図面は本発明の実施例を示し、第1図(a)および第1
図(b)は砂詰め治具の縦断側面図および正面図、第2
図は砂詰め治具を装着したロストフオームの縦断正面図
、第3図(a)はロストフオームを鋳枠内に入れた状態
を示す図、第3図(b)および第3図(C)はロストフ
オームの内部に鋳物砂を充填する要領を説明するための
説明図である。
1・・・砂詰め治具、2・・・ロストフオーム、2a・
・・孔部、5・・・鋳枠、6・・・鋳物砂。
(孔
(#詰めj絹)1′
Δ
(C1)
第2図
、郁)二
第1図
(b)The drawings show embodiments of the invention, and FIG. 1(a) and FIG.
Figure (b) is a vertical side view and front view of the sand filling jig, and the second
The figure is a vertical front view of the lost foam with the sand filling jig attached, Figure 3(a) is a diagram showing the lost foam placed in the flask, Figures 3(b) and 3(C) FIG. 2 is an explanatory diagram for explaining the procedure for filling the inside of the lost foam with foundry sand. 1... Sand filling jig, 2... Lost form, 2a.
... Hole, 5... Casting flask, 6... Foundry sand. (hole (#stuffed silk) 1' Δ (C1) Fig. 2, Iku) 2 Fig. 1 (b)
Claims (1)
物砂に埋設し、その後、上記ロストフォームを溶湯によ
り消失させながら筒状鋳物を得るロストフォーム鋳造方
法であって、予め上記ロストフォームの開口部に、鋳物
砂をロストフォーム内方にのみ移動させる砂詰め治具を
装着しておき、この砂詰め治具が装着されたロストフォ
ームを上記鋳枠内に入れてロストフォーム内部に鋳物砂
を上記砂詰め治具を介して充填することを特徴とするロ
ストフォームの鋳造方法。(1) A lost form casting method for obtaining a cylindrical casting by embedding a cylindrical lost form with a curved inside in molding sand in a casting flask and then disappearing the lost form with molten metal, the method comprising: A sand filling jig that moves the foundry sand only inward to the lost form is installed in the opening of the lost form, and the lost form with the sand filling jig attached is placed in the flask and the casting is placed inside the lost form. A lost foam casting method characterized in that sand is filled through the sand filling jig.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6382588A JPH01237045A (en) | 1988-03-17 | 1988-03-17 | Method for casting lost foam pattern |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6382588A JPH01237045A (en) | 1988-03-17 | 1988-03-17 | Method for casting lost foam pattern |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01237045A true JPH01237045A (en) | 1989-09-21 |
Family
ID=13240527
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6382588A Pending JPH01237045A (en) | 1988-03-17 | 1988-03-17 | Method for casting lost foam pattern |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01237045A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5076345A (en) * | 1990-02-26 | 1991-12-31 | Navistar International Transportation Corp. | Method for making a casting having an integral hose connection |
EP1052042A1 (en) * | 1999-05-13 | 2000-11-15 | Raccorderie Metalliche S.p.A. | Process for manufacturing a hollow central body for the connection of pipe fittings |
CN102958628A (en) * | 2011-01-28 | 2013-03-06 | 丰田自动车株式会社 | Lost pattern, method for producing lost pattern, and method for producing die using lost pattern |
-
1988
- 1988-03-17 JP JP6382588A patent/JPH01237045A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5076345A (en) * | 1990-02-26 | 1991-12-31 | Navistar International Transportation Corp. | Method for making a casting having an integral hose connection |
EP1052042A1 (en) * | 1999-05-13 | 2000-11-15 | Raccorderie Metalliche S.p.A. | Process for manufacturing a hollow central body for the connection of pipe fittings |
CN102958628A (en) * | 2011-01-28 | 2013-03-06 | 丰田自动车株式会社 | Lost pattern, method for producing lost pattern, and method for producing die using lost pattern |
CN102958628B (en) * | 2011-01-28 | 2015-06-17 | 丰田自动车株式会社 | Lost pattern, method for producing lost pattern, and method for producing die using lost pattern |
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